This rule wasn't enforced anyway...

I travel a lot - and never take out any liquids. Have nail clippers and scissors in my carry-on.

Once I even had an opinel pocket knife in my laptop bag for a couple of months.

Travelled through Tokyo, Taipei, SFO, DEN, PHX, LAX, BOS, JFK, FRA, AMS, MUC, LHR - nobody noticed.

I seriously had forgotten it was there, so I don't do that now, but still...

Also, no large water bottles or similar. Unless on domestic flights in Japan, where this is totally fine.

IDK - security theater. But if it helps.